#include <stdio.h>

int main()
{
	unsigned char a  = 0;
	a = 0x12; 
	unsigned char b  = 0;
	b = a;  // 0x12
		
	unsigned char* p1 = NULL;
	p1 = &a;
	unsigned char* p2 = NULL;		
	p2 = p1;
	printf("%#x\n",*p2);
	
	*p1 = 0x34;	
	printf("%#x\n",a);
	
	p2 = &b;
	*p1 = *p2;    //     = 12
	printf("%#x\n",a);
	
	
	
	



	return 0;
}

